1 files changed, 46 insertions, 0 deletions
diff --git a/app/graphql/mutations/incident_management/timeline_event/promote_from_note.rb b/app/graphql/mutations/incident_management/timeline_event/promote_from_note.rb
new file mode 100644
index 00000000000..73a20b8a380
--- /dev/null
+++ b/app/graphql/mutations/incident_management/timeline_event/promote_from_note.rb
@@ -0,0 +1,46 @@
+# frozen_string_literal: true
+
+module Mutations
+  module IncidentManagement
+    module TimelineEvent
+      class PromoteFromNote < Base
+        graphql_name 'TimelineEventPromoteFromNote'
+
+        argument :note_id, Types::GlobalIDType[::Note],
+                 required: true,
+                 description: 'Note ID from which the timeline event promoted.'
+
+        def resolve(note_id:)
+          note = find_object(id: note_id)
+          incident = note&.noteable
+
+          authorize!(incident)
+
+          response ::IncidentManagement::TimelineEvents::CreateService.new(
+            incident,
+            current_user,
+            promoted_from_note: note,
+            note: note.note,
+            occurred_at: note.created_at
+          ).execute
+        end
+
+        private
+
+        def find_object(id:)
+          GitlabSchema.object_from_id(id, expected_type: ::Note).sync
+        end
+
+        def authorize!(object)
+          raise_noteable_not_incident! if object && !object.try(:incident?)
+
+          super
+        end
+
+        def raise_noteable_not_incident!
+          raise_resource_not_available_error! 'Note does not belong to an incident'
+        end
+      end
+    end
+  end
+end